TLS, one page, 8.5 x 7, American Base Ball Club of Philadelphia letterhead, June 30, 1936. Letter to a Dr. John G. O'Meara of Providence, Rhode Island, with whom he maintained a regular correspondence. Mack thanks Dr. O'Meara for sending him some newspaper articles. In part, 'Hope to have the pleasure of seeing you in Boston on my next visit.' In fine condition. RRAuction COA.
